25775217 has 12 divisors (see below), whose sum is σ = 40094964. Its totient is φ = 15861600.

The previous prime is 25775209. The next prime is 25775219. The reversal of 25775217 is 71257752.

It can be written as a sum of positive squares in 2 ways, for example, as 10751841 + 15023376 = 3279^2 + 3876^2 .

It is not a de Polignac number, because 25775217 - 2³ = 25775209 is a prime.

It is a super-2 number, since 2×25775217² = 1328723622794178, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25775219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 110034 + ... + 110267.

It is an arithmetic number, because the mean of its divisors is an integer number (3341247).

Almost surely, 2^25775217 is an apocalyptic number.

It is an amenable number.

25775217 is a deficient number, since it is larger than the sum of its proper divisors (14319747).

25775217 is a wasteful number, since it uses less digits than its factorization.

25775217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220320 (or 220317 counting only the distinct ones).

The product of its digits is 34300, while the sum is 36.

The square root of 25775217 is about 5076.9298793661. The cubic root of 25775217 is about 295.3933926209.

The spelling of 25775217 in words is "twenty-five million, seven hundred seventy-five thousand, two hundred seventeen".